JPS6342498Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a thin transformer constructed using a frame-shaped core and a prismatic core.

Conventional thin transformers of this type are shown in Figure 1~
It was constructed as shown in FIG.

That is, a plurality of I-shaped electromagnetic steel plates punched out are laminated on opposing surfaces of two frame-shaped cores 1 and 2, which are formed by winding a hoop material of an electromagnetic steel plate such as a silicon steel plate into a ring shape. A prismatic core 3 is arranged so as to divide the frame cores 1 and 2 into two, and a coil 5 consisting of a primary winding and a secondary winding is wound around this prismatic core 3 via a coil bobbin 4. The transformer body 6 has both side plates 7 and a top plate 8, and engaging claw pieces 9 are provided on both sides of the lower ends of the both side plates 7, and the fitting protrudes outward between the engaging claw pieces 9. A mounting bracket 12 provided with a mounting piece 11 having a hole 10 was placed over the frame core 2, and the engaging claw piece 9 was bent along the lower surface of the frame-shaped core 2.

In this configuration, since the mounting bracket 12 that has the function of mounting to external equipment is provided on the outer periphery of the frame cores 1 and 2, the mounting space occupied by the thin transformer in the external equipment is as shown in Figure 1. As shown by the two-dot chain line shown in the figure, there were drawbacks that increased in size.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the conventional transformer, and to provide a thin transformer in which the mounting function is provided within the external dimensions of the frame-shaped core, thereby reducing the mounting space. It is.

In order to achieve the above object, the present invention is characterized by a configuration in which a mounting bracket is provided which is coupled to the inner peripheral surface of the prismatic core or coil bobbin that is incorporated between the frame-shaped cores, and further to the inner circumferential surface of the frame-shaped core.

Embodiments of the present invention will be described below with reference to FIGS. 6 to 17.

First, in the embodiment shown in FIGS. 6 to 8,
Reference numerals 13 and 14 denote frame-shaped cores made of ferrite or wound with a hoop material of an electromagnetic steel plate such as a silicon steel plate, an amorphous magnetic alloy plate, or an iron-nickel alloy plate. A fixing groove 15 is provided in the center of a pair of opposing sides of the opposing surfaces.
are formed respectively.

Between these two frame-shaped cores 13 and 14, a prismatic core 16 made of laminated multiple I-shaped electromagnetic steel plates or made of ferrite is incorporated so that both ends fit into the fixing grooves 15. A coil bobbin 18 wound with a coil 17 consisting of a primary winding and a secondary winding is attached to the prismatic core 16, and a U-shaped mounting bracket 19 is installed on the outside of the coil bobbin 18.

This mounting bracket 19 has side plates 21 and 22 rising upward on both sides of a bottom plate 20, and the bottom plate 20 is wider than the side plates 21 and 22.
The wide part of 0 has mounting holes 2 for external equipment.
3 are provided, and square holes 24 through which the prismatic cores 16 are inserted are provided in the upper portions of both side plates 21 and 22, respectively.

With this configuration, the assembly is performed by positioning and arranging the mounting bracket 19 around the outer periphery of the coil bobbin 18 on which the coil 17 is wound.
The prismatic core 16 is inserted into the square holes 24 of 1 and 22 and the center hole of the coil bobbin 18, and is assembled onto the frame core 14. The frame core 13 is assembled onto this, and the prismatic core 16 and the frame core 13, 14 by welding, using a clamping tool, or by using an adhesive to combine and integrate the transformer into a thin transformer.

Further, the embodiment shown in FIGS. 9 to 11 uses two L-shaped bent fittings as the mounting fittings, and these mounting fittings 19, 19'
is composed of a bottom plate 20 with a mounting hole 23 and a vertical plate 26 having a rectangular notch 25 in the upper end into which the prismatic core 16 is fitted. If used, the prismatic core 1 incorporates the coil bobbin 18 wound with the coil 17.
6 is assembled between the frame-shaped cores 13 and 14, an effect can be obtained in which the assembly order can be selected. The mounting fittings 19, 19' can be fixed to the prismatic core 16 by fitting both ends.

Further, in the embodiment shown in FIGS. 12 to 14, a split bobbin is used as the coil bobbin 18, a coupling groove 28 is provided in the middle of the intermediate collar 27 in the thickness direction, and a mounting bracket 19 is provided in the coupling groove 28 of the coil bobbin 18. This is a configuration that incorporates. This mounting bracket 19
is a bottom plate 20 with a mounting hole 23, and this bottom plate 20.
It has a vertical plate 26 that stands up in the middle, and a notch 25 that fits into the coupling groove 28 at the top of this vertical plate 26.
The coil bobbin 18 is assembled into the coupling groove 28 of the coil bobbin 18 by using the notch 25, and is coupled by a fitting at the upper end of the vertical plate 26. This also has the effect that the order of incorporation can be selected arbitrarily.

Furthermore, in the case shown in FIGS. 15 to 17, a front plate 29 and a back plate 30 are provided as mounting fittings 19 on a bottom plate 20 having a mounting hole 23 so as to protrude upward. is inserted between the coil 17 and the inner peripheral surfaces of the frame-shaped cores 13 and 14, and the bent pieces 31 are provided at the upper ends of the front plate 29 and the back plate 30.
are bent along the upper surface of the frame-shaped core 13 and engaged, and the frame-shaped core 14, front plate 29, and back plate 30 are fixed and assembled by welding or the like.
In this case, the mounting bracket 19 can also be assembled in the final process, and the frame-shaped cores 13 and 14 can be connected to each other by the mounting bracket 19.
It can be made to cum.

In addition, in each of the above embodiments, the mounting bracket 19,
It is a condition that all the bottom plates 20 of 19' have a size within the external dimensions of the frame-shaped cores 13 and 14.

As the thin transformer of the present invention is constructed as described above, the mounting bracket is located within the outer dimensions of the frame-shaped core, so the mounting space for external equipment is limited to the outer dimensions of the frame-shaped core. It has the advantage of being able to be miniaturized as a transformer and easy to integrate, and is of great practical value.

[Brief explanation of drawings]

Fig. 1 is a top view showing a conventional thin transformer, Fig. 2 is a sectional front view, Fig. 3 is an exploded perspective view, and Fig. 4 is a top view of a conventional thin transformer.
The figure is an exploded perspective view of the core portion of the transformer, FIG. 5 is a sectional side view of the core portion, FIG. 6 is a bottom view showing an embodiment of the thin transformer of the present invention, and FIG. 7 is a sectional front view of the same. , FIG. 8 is an exploded perspective view of the same, FIG. 9 is a bottom view showing a thin transformer of another embodiment, FIG. 10 is a sectional front view of the same, FIG. 11 is an exploded perspective view of the same, and FIG. A bottom view showing a thin transformer according to an embodiment of
FIG. 13 is a sectional front view, FIG. 14 is an exploded perspective view, FIG. 15 is a bottom view of main parts showing a thin transformer of another embodiment, FIG. 16 is a sectional side view, and FIG. It is an exploded perspective view. 13, 14... Frame-shaped core, 15... Fixing groove, 16...
Prismatic core, 17...coil, 18...coil bobbin,
19, 19'...Mounting bracket, 20...Bottom plate, 21,2
2...Side plate, 23...Mounting hole, 24...Square hole, 25...Notch, 26...Vertical plate, 27...Intermediate collar, 28...Joining groove, 29...Front plate, 30...Back plate, 31...Bending piece.

Claims (1)

[Scope of utility model registration request] A prismatic core is arranged on opposing surfaces of the two frame-shaped cores so as to divide the frame-shaped core into two, and a coil bobbin wound with a coil consisting of a primary winding and a secondary winding is installed in this prismatic core, A thin type that incorporates the above-mentioned prismatic core or coil bobbin, and a mounting bracket having a mounting hole for external equipment on the inner peripheral surface of the frame-shaped core and a bottom plate located within the external dimensions of the frame-shaped core. Trance.